Pump for inflating rubber tires.



G. A. HAAS. PUMP FOR INFLATING RUBBER TIRES.

APPLICATION FILED JULY 24, 1909.

2 SHEETSSHEET 1.

Patented July 18, 1911.

7 11V VENTOR. Cyrus A-Haas- BY 6; A TTORNEY.

COLUMBIA PLANOORAFH 60., WASHINGTON. D. C.

IVITNESSES:

G.-A.HAAS. PUMP FOB INFLATING RUBBER TIRES.

APPLICATION FILED JULY 24, 1909.

Patented July 18,1911.

2 SHEETS-$311121 2.

INVENT OR. CyrusA-Haas I BY -fi' ATTORNEY.

WITNESSES: fl -M COLUMIIA Nod-AF" C0" WMHINGTQN. D. C.

UNITED STATES PATENT OFFICE.

CYRUS A. I-IAAS, OF ST. LOUIS,

M I S S O U R I PUMP FOR INFLATING RUBBER TIRES.

Specification of Letters Patent. Application filed July 24, 1909.

Patented July 18, 1911. Serial No. 509,422.

To all whom it may concern:

Be it known that I, CYRUS A. HAAS, a citi zen of the United States,residing at St. Louis, State of Missouri, have invented cer tain new anduseful Improvements in Pumps for Inflating Rubber Tires, of which thefollowing is a full, clear, and exact description, reference being hadto the accompanying drawings, forming a part hereof.

My invention has relation to improve ments in pumps for inflatin rubbertires; and it consists in the novel construction of pump more fully setforth in the specification and pointed out in the claims.

In the drawings, Figure l is a top plan of an automobile frame showingthe motor and fly-wheel with pump applied thereto; Fig. 2 is a detachedtop plan view of the pump with friction gear in section; Fig. 3 is aside elevation of the pump mounted on the automobile frame and withfriction-gear in engagement with the motor fly-wheel; Fig. 4 is across-section on the curved line H of Fig. 3; Fig. 5 is a side elevationof the pump with handle removed showing the piston at half stroke in onedirection; Fig. 3 is a similar view showing piston at halfstroke in theopposite direction; Fig. 7 is an enlarged longitudinal sectional detailof one end of the oscillating cylinder and piston rod and stufling boxtherefor; Fig. 8 is a face view of the port side of the cylinder; Fig. 9is a face view of the port side of the casing through which thecompressed air is delivered to the hose coupled to the tire to beinflated; Fig. 10 is an enlarged cross section on the line 10-10 of Fig.3; and Fig. 11 is a top plan of a modified form of one end of the casingreceiving the compressed air from the pump cylinder.

The object of my inveiition is to provide an air pump which may beactuated by the fiy-wheel of the motor'of an automobile or otherrotating part for the compression of air to be dischargedinto theinflatable section of the rubber tire of the wheel by which the body ofthe vehicle is supported. Such a pump will necessarily dispense with thenecessity of hand pumping, so that the work of the chauffeur will bematerially reduced.

A further object is to construct a pump which will be double acting, onedispensing with check-valves and valve ports so that there is nomaterial loss in pressure due to friction and the actuation of valves,thereby permitting a very high speed; one in which the compressed airtakes a most direct route to the point of destination, one composed of aminimum number of parts, one which is cheap, simple, durable andreliable; one under ready control of the operator, one which can beactuated by a flywheel rotating in either direction, one which isquickacting and requiring a minimum amount of power for its actuation;and one possessing further and other advantages better apparent from adetailed description of the invention which is as follows Referring tothe drawings, M represents the driving motor, W the fiy-wheel, F theframe supporting the motor, and T the inflated tires of the wheels ofthe automobile. These features are shown more or less conventionally asthey are well understood in the art and form no part of the presentinvention. Preferably (though not necessarily) bolted to the framemember F opposite the periphery of the fly-wheel is a socket 1 for thereception of a block 2 pivotally suspended from, or attached to, thebent skeleton arm 3 forming the outer terminal of the pump casing orcylindersupport 4, the free end of the arm carrying the friction-wheelor sheave 5 the rim of which carries a yield ing rubber, aluminum orother friction band 6 which is pressed directly against the periphery ofthe fly-wheel W when the pump is to be set in operation. Thecross-section of the casing l is shown to best advantage in Fig. 10 alarge bulk of the metal. being removed from between the sides to makethe casting or drop forging as light as possible. The sides of thecasing converge rearwardly terminating in a socket 4 into which may bescrewed a hollow handle H as shown in Figs. 1 and 2, or a forked plug Pas shown in the modification in Fig. 11. Where a hollow handle isemployed a small tube 7 is screwed into the outer end thereof and leftto project beyond the handle, such projecting end receiving a socket 8over the terminal stem 9 of which is slipped one end of the hose 10, theopposite end of the hose being coupled to the casing a of thecheckvalvecarried by the inflatable portion of the tire T. The check-valve is notdescribed herein as the same forms the subject-matter of a separateapplication; besides, any available check-valve might be employed withthe present pump.

Formed on the outer face of the casing 4 near the center is a hollowboss 11 which ports 0, 0, at either end of the cylinder is thus onlypossible when the cylinder has been oscillated to one of its extremepositions (Figs. 5, (3) or at the end of the first and third quarterrotation of the wheel 5, the second and fourth quarters bringing thepiston rod into parallelism with the cylinder axis, and hence causingthe cylinder to assume the position shown in Fig. 3 (said figure showingthe piston rod at the end of the last quarter revolution of the wheel.The contacting or rubbing faces (7, e, (Z, c, naturally bring theirrespective ports 0, 0, 0, close together and hence check-valves and thelike are dispensed with.

Th operation will now be apparent from the previous description and isas follows Let us assume that the fly-wheel W is rotating in thedirection shown by the arrow in Fig. 3. The operator then inserts theblock 2 into the socket 1 and with his hand (Fig. 1) he rocks the handleIf so as to forc ibly press the band 6 of the wheel 5 receives thehollow stud or spindle 12 of the oscillating cylinder 13, the spindle 12being secured to the boss ll by means of a nut 1st passed over thereduced screw-threaded end of the spindle and bearing against a bentwasher l5 conforming in curvature to a cylindrical surface, the washerbeing interposed between the nut and the end of the boss (Fig. 2). Thepiston-rod 16, leading from the piston 1'7 of the cylinder passesthrough a stuffing-box 18 at one end of the cylinder. the gland orfollower 19 of the said stu'tling box having a flattened portion or toafford a better grip thereof by a wrench or other tool by which thegland is to be adjusted. The gland serves as a bearing for thepiston-rod and by first loosening the jam-nut n, the gland may beproperly adjusted as obvious from Fig. 7; and whn adjusted and the nutlocked, the axes of the bearing and of the pistonrod and cylinder are inperfect alinement. The outer end of the piston rod is pivotally coupledto the adjacent face of the friction against. the rapidly rotatingfly-wheel. The wheel at a suitable distance from the axis wheel 5 will.then rotate as shown by the arrow in Fig. 3 carrying the piston rod withit and oscillating the cylinder 1?) about its transverse axis first upand then down as shown in Figs. 5 and (3. hen the wheel 5 has made aquarter turn (Fig. 5) the ports 0, 0 at opposite ends of the cylinderare then of rotation thereof, so that as the wheel 5 rotates it will notonly impart a reciprocating motion to the piston, but will necessarilyoscillate the cylinder 13 about the axis of the spindle 12.

Disposed in the pump-casii'ig or cylindersupport t adjacent to itsconverging sides superposed over the diagonally opposite arepassage-ways 7), 7), the converging ends ports 0, 0 of the respectivepairs of ports of one or both of which may be closed by 0, 0, 0, 0, ofthe casting at, the piston traveling from right to left and driving theair before it through the registering ports 0, 0, at the left hand endof the cylinder into the upper leg 7) and passage-way 7) of the castingt, into the hollow handle H, hose 10, and into the tire T. By the timethe wheel 5 has ended the third quarter of its screw-plugs '20 (one orboth being closed according tocircumstances as presently to be seen). The diverging ends of said passage-ways terminate in legs or extensions7/ 7/ whose outer terminals open through the screw-nipples 21, theirinner ends b ing spaced a suitable distance apart and A similar pairopening into the ports 0 0. rotation (Fig. 6) the cylinder will have ofports 0, 0 lead from the pas ag -W y been rocked in the oppositedirection, the near their converging ends (Fig. 9). The ports 0, 0thereof have been superposed last set. of ports are disposed 11 eitherside over the remaining diagonally opposite of the center of a flatwearing surface or formation (1, the first set being disposed similarlyon the rubbing surface or formation (3. These formations (Z', 6 form therubbing faces for a similar set of faces or formations (.7, c disposedon the cylinder 13 on opposite sides of the spindle 12 (Fig. 8), theformations (Z, c on the other hand being provided with ports 0, 0 at thecenters of the respective formations, so that when the formations (Z, con the cylinder are superposed directly over the formations (Z', c ofthe cylinder-support 4 (Figs. 3, t) for the end of either stroke of thepiston or for that position of the cylinder where its axis is parallelto the axis of the casting st, the ports 0, 0 of the cvlinder will bebetween the ports 0, 0 of the cylinder-support 4t, and there will be nocommunication between them. Intercommunication between the ports 0, 0'of the pairs 0, 0, 0, 0, the piston now traveling from left to right anddriving the air before it through the registering ports 0, 0 at theright hand end of the cylinder, into the handle H and so on to the tireT Of course one of the nipples 21 must be closed by a screw-cap 22. thecap being on the nipple which is identified with the passage-way p 7),into which the air is driven on its way to the tire with either strokeof the piston. With the wheels W and 5 rotating in the directionillustrated (Fig. 3), the upper nipple 21 will be closed and the lowernipple left uncovered since the open nipple serves as the intake end forthe air which is subsequently expelled with a stroke of the piston inthe opposite direction. In Fig. 5 for example the air will enter theopen nipple, thence pass through the passage-way 7) to the right handend its left end downward (Fig. 6).

of the passage 72 where the screw-plug 20 arrests it, compelling the airto flow through the registering ports 0, at the right hand end of thecylinder, into the cylinder behind the piston. In Fig. 6 on the otherhand, the air enters through the open nipple 21 into the left handpassage or leg 79, thence at once flows through the registering ports 0,0, at the left hand end of the cylinder, directly behind the pistonwhich is now traveling from left to right expelling the air before it asalready described. The plug 20 thus compels the air to flow into thecylinder behind the piston, while the cap 22 prevents the air forced bythe piston, from escaping into the atmosphere, constraining it to flowinto the handle H as described. If, however, the flywheel happens to beretating in the opposite direction from that shown in Fig. 3, so as toreverse the rotation of the wheel 5, then it would follow that theexpulsion of the air from the cylinder would take place from the lefthand end while the cylinder was being oscillated with In that event wewould put the cap 22 on the lower nipple 21 using the upper nipple forthe intake. At the same time we would remove the plug 20 from the lowerpassage 39 and plug up the end of the upper passage. The operator canalways adjust the screwcap 22 and plug 20 knowing the direction theflywheel of his motor is turning preparatory to his pumping or inflatinga tire.

IVhen not in use the wheel with its supporting arm 3 may be swung out ofengagement with the wheel W, the block 2 remaining permanently in thesocket 1 of the 1notorframe if desirable.

It will be seen by an inspection of Fig. 2, that the tighter we drivethe nut 14 against the cylindrically bent washer 15, the tighter will wedraw together the rubbing faces (7, (Z, 6, c, of the cylinder 13 andcylindersupport 4 respectively and lessen liability of leakage of thecompressed air passing through the ports 0, 0. In the course ofinflation of a tire, of course, no perceptible leakage or blow-off ofthe air takes place from between the rubbing faces referred to, but whena tire is fully inflated the excess of air expelled by the pump will nowblow off or leak out from bet-ween the faces. Since a three inch tirefor example has less power of resistance than a four inch (beinglighter) the nut 14 must be set ata tension to correspond to such threeinch tire. For a four-inch tire the nut 14 is tightened so as toincrease the intensity of contact between the respective rubbing facesthus in creasing the resistance to the final blow-off of the air whensuch tire is fully inflated. In other words, the lighter the tire theless should be the pressure on the washer 15 so that the blow-oft maytake place at a pressure corresponding to the resisting capacity of anygiven tire. To enable the nut 14 to be properly set for any given tire,the sides of the nut are graduated or marked with numbers 3, 4, etc.,corresponding to the cross-sectional diameter of the tire in inches (thenumber 4 appearing in the illustration in Fig. 2) and when any givennumber appears at the top of the nut we know that the same has beenscrewed down sufficiently for a particular tire. When set, the nut maybe locked by a cotter 0r pin (not shown), inserted through registeringopenings formed in the nut and screw-threaded portion of the hollowspindle 12. N0 importance however, is attached to this method of lockingthe nut as it is well understood in the art. The cavity in the spindle12 serves for the introduction of oil, an oil hole at the bottom thereofconducting the oil between the inner surface of the hub or boss 11 andthe spindle 12. This however, is also well understood in the art.

Having described my invention, what I claim is 1. In combination with arotatable member, a pump-cylinder oscillating about a fixed axisdisposed parallel to the axis of the rotatable member, and provided witha reciprocating piston, a piston-rod leading toward the rotatable memberfrom the piston, a pivoted cylinder-support provided with suitableintake and discharge passageways establishing intercommunication betweenthe interior of the cylinder and said passage-ways, a wheel on thesupport rotatable about a fixed center and having one face thereofcoupled to the outer end of the pistonrod, the periphery of said wheelengaging the periphery of the rotatable member under a positive thrustexerted against the rotatable member through the wheel aforesaid, andmeans for connecting the wheel to the support from the side opposite thepiston rod whereby the center line 'of said thrust will be brought inthe plane passing through the center of the wheel and at right angles tothe axis of rotation thereof, and a terminal member on thecylinder-support disposed in the line of thrust aforesaid, through whichthe thrust is exerted.

2. In combination with a closed pumpcylinder oscillating about a fixedaxis and provided with a reciprocating piston, a piston-rod leading inone direction from the piston through one end of the cylinder, acylinder support having intercommunicating intake and dischargepassageways disposed symmetrically on opposite sides of the axis of thesupport and of the axis of oscillation of the cylinder, and convergingtoward the axis of the support, awheel on the support rotatable about acenter disposed on the axis of the support and coupled to the outer end.of the piston-rod, formations opposite the convergence of the respectivepassage-ways on the support, and on the cylin' der respectively,affording rubbing faces, the iliormations being provided with portspositioned to atlord interconnnunication between the interior of thecylinder and the passageways, means for closing the outer end of one ofthe intake passageways, and a hollow handle coupled to the support forconducting the expelled fluid to a suitable point of consumption.

3. In combination with a closed pumpcylinder oscillating about a fixedaxis and provided with a reciprocating piston, a piston-rod leading inone direction from the piston through one end of the cylinder, acylinder support provided with suitable intake and dischargepassage-ways, means on the cylinder and support respectively forestablishing intercominunication between the interior of the cylinderand said passageways, a wheel on the support rotatable about a centerdisposed on the axis of the support and coupled to the outer end of thepistonrod, and a hollow handle coupled. to the support at the endopposite the wheel for conducting away the expelled fluid, the

longitudinal center of the handle being on the line of the axis of thesupport, and in the central plane of rotation of the wheel.

&. An air-pump for inflating automobile rubber tires, comprising arotatable wheel adapted to be frictionally geared to the flywheel of themotor, a supporting arm for the wheel, a cylinder-support coupled to thearm, a cylinder mounted to oscillate in the support about a centraltransverse axis, a piston and piston-rod for the cylinder, the outer endof the rod being coupled to the wheel, a socket formed on thecylinder-support, a hollow-handle coupled to the socket and providedwith a hose extension leading to the tire, the cylinder andcylinder-support being provided with suitable ports and passage-ways fordrawing in, and expelling the air from, the cylinder into the hollowhandle and hose and into the tire, with each stroke of the piston.

In testimony whereof I a tliX my signature, in presence of twowitnesses.

CYRUS A. 'HAAS.

itnesses EMIL STAREK, FANNIE E. WEBER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. 0.

